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CN-224229291-U - Chemical production is with two activity gate valves

CN224229291UCN 224229291 UCN224229291 UCN 224229291UCN-224229291-U

Abstract

The utility model relates to a double-movable gate valve for chemical production, which comprises a valve body, wherein valve covers are detachably and fixedly connected to the upper end and the lower end of the valve body, two valve seats are detachably and fixedly connected to the inner wall of the valve body, a piston cylinder extending leftwards and rightwards is arranged between the two valve seats, the left end and the right end of the piston cylinder are respectively and slidably connected with pistons, a gate plate is detachably and fixedly connected to one end, far away from each other, of the two pistons, the two gate plates are respectively opposite to the two valve seats, guide blocks are fixedly connected to one end, close to each other, of the two guide blocks, guide inclined planes are respectively arranged on one side, close to each other, of the two guide blocks, a hollow valve rod is detachably and fixedly connected to the top of the piston cylinder, a hollow extrusion rod penetrates through the inner cavity of the valve rod, and the lower end of the extrusion rod is provided with two extrusion inclined planes which are respectively matched with the guide inclined planes of the two guide blocks. According to the utility model, through the extrusion rod, the hydraulic pressure or the air pressure is provided by matching with an external fluid source, so that the two flashboards horizontally move, the friction between the flashboards and the ports is greatly reduced, the durability is improved, and the tightness is higher.

Inventors

  • PAN JIAN
  • PAN YUE
  • ZHANG MENG
  • Ning Zizhong

Assignees

  • 山东若水工贸有限责任公司

Dates

Publication Date
20260512
Application Date
20250522

Claims (10)

  1. 1. A double-movable gate valve for chemical production comprises a valve body (1), valve covers (2) are fixedly connected to the upper end and the lower end of the valve body, and is characterized in that two left and right opposite valve seats (3) are arranged on the inner wall of the valve body (1), two conveying pipes (10) corresponding to the two valve seats (3) are fixedly connected to the valve body, a piston cylinder (4) is arranged between the two valve seats (3), pistons (5) are slidably connected to the left end and the right end of the piston cylinder (4), gate plates (6) are fixedly connected to the ends, far away from each other, of the two pistons (5), the two gate plates (6) are respectively matched with the two valve seats (3) in a sealing mode, a valve rod (8) is fixedly connected to the top of the piston cylinder (4), the upper end of the valve rod penetrates through the valve covers (2) to extend to the outside, and a driving assembly for driving the two pistons (5) to axially move away from each other along the piston cylinder (4).
  2. 2. The double movable gate valve for chemical production according to claim 1, wherein the valve rod (8) is arranged in a hollow mode, one ends, close to each other, of the two pistons (5) are fixedly connected with guide blocks (7), one sides, close to each other, of the two guide blocks (7) are provided with guide inclined planes (18), the driving assembly is an extrusion rod (9) penetrating through the valve rod (8) and sliding up and down, the lower end of the extrusion rod (9) penetrates through the piston cylinder (4) to extend between the two guide blocks (7), two extrusion inclined planes (19) are arranged at the lower end of the extrusion rod (9), and the two extrusion inclined planes (19) are matched with the guide inclined planes (18) of the two guide blocks (7) respectively.
  3. 3. The dual-movable gate valve for chemical production according to claim 2, wherein the extrusion rod (9) is internally provided with an air inlet pipe (21) in a penetrating way, the air inlet pipe (21) extends along the length direction of the extrusion rod (9) and penetrates through the extrusion rod (9), the upper end of the air inlet pipe (21) is connected with an external fluid source, the air inlet pipe is connected with an exhaust pipe (22), and the air inlet pipe and the exhaust pipe are both provided with switch valves (23).
  4. 4. The double movable gate valve for chemical production according to claim 2, wherein an annular ventilation cavity (28) is formed between the extrusion rod (9) and the valve rod (8), one conveying pipe (10) is communicated with the annular ventilation cavity (28) through an air inlet pipe (21), the other conveying pipe (10) is communicated with the annular ventilation cavity (28) through an air outlet pipe (22), and the air inlet pipe and the air outlet pipe are both provided with switch valves (23).
  5. 5. The double movable gate valve for chemical production according to claim 4, wherein an annular clamping groove is formed in the lower end of the valve rod (8), a guide ring (27) is embedded in the annular clamping groove, the inner diameter of the guide ring is matched with the outer diameter of the extrusion rod (9), and a plurality of ventilation grooves (271) are formed in the inner wall of the guide ring (27) along the circumferential direction.
  6. 6. The dual-movable gate valve for chemical production according to claim 1, wherein a partition plate (29) positioned between two pistons (5) is fixedly connected in the piston cylinder (4), an air charging cavity is formed between each piston (5) and each partition plate (29), the driving assembly is two air inlet pipes (21) fixedly connected in the valve rod (8), the two air inlet pipes penetrate through the valve rod (8) and are respectively communicated with the two air charging cavities, the two air inlet pipes (21) are respectively connected with an external fluid source, the two air inlet pipes (21) are respectively connected with an air outlet pipe (22), and the air inlet pipes and the air outlet pipes are respectively provided with a switch valve (23).
  7. 7. The dual-movable gate valve for chemical production according to any one of claims 1-6, wherein the left end and the right end of the piston cylinder (4) are fixedly connected with outer sealing sleeves (14), and the two outer sealing sleeves (14) are respectively sleeved on the two gates (6).
  8. 8. The double-movable gate valve for chemical production according to any one of claims 1-6, wherein a single-wall corrugated pipe (24) is arranged between the piston cylinder (4) and the gate plate (6), one end of the single-wall corrugated pipe (24) is fixedly connected with the piston cylinder (4) in a sealing way, and the other end of the single-wall corrugated pipe is fixedly connected with the gate plate (6) in a sealing way.
  9. 9. The double-movable gate valve for chemical production according to claim 8, wherein a hollow double-wall corrugated pipe (25) is arranged between the gate plate (6) and the valve seat (3), the double-wall corrugated pipe (25) is fixedly connected with the valve seat (3), a vent pipe (26) is fixedly connected to the valve body, one end of the vent pipe (26) is communicated with the inner cavity of the double-wall corrugated pipe (25), and a switch valve (23) is arranged on the vent pipe (26).
  10. 10. The double movable gate valve for chemical production according to claim 8, wherein a hollow rubber tube (30) is arranged between the gate plate (6) and the valve seat (3), the rubber tube (30) is annular and fixedly connected with the valve seat (3), a vent tube (26) is fixedly connected to the valve body, one end of the vent tube (26) is communicated with the inner cavity of the rubber tube (30), and a switch valve (23) is arranged on the vent tube (26).

Description

Chemical production is with two activity gate valves Technical Field The utility model relates to the technical field of gate valves, in particular to a double-movable gate valve for chemical production. Background In chemical production, the gate valve is a valve commonly used in chemical gas transmission pipelines. The gate valve generally comprises a valve body and a gate, wherein an inlet and an outlet are arranged on the valve body, the gate is connected to the valve body in a sliding manner, and the opening or closing of the inlet and the outlet is controlled through the movement of the gate. For example, CN106439776a discloses a self-adaptive drain capacity-expansion control device for a once-through boiler, which is actually a common gate valve structure, and seals by plugging an input port and an output port on two sides through a trapezoid valve core (i.e. a gate) sliding up and down. The flashboard of the existing flashboard valve adopts the straight up-down mode, so that larger vertical friction is generated between the flashboard and ports on two sides when the flashboard valve is opened or closed, the ports on two sides and the flashboard are worn, the service life of the valve is shorter, leakage is easy to occur when the flashboard is excessively worn, the sealing performance is insufficient, and the sealing effect is affected. Disclosure of utility model Aiming at the defects of the prior art, the utility model provides the double-movable gate valve for chemical production, which adopts a double-gate plate structure, and the two gate plates are driven by the driving assembly to horizontally move and mutually separate from the valve seats at the two sides of the plugging, so that the friction between the gate plates and the valve seats is greatly reduced, the double-movable gate valve is more durable, and the sealing performance is improved. And all adopt the components of a whole that can function independently design between disk seat and the valve body between valve rod, extrusion rod and the flashboard, each part is convenient to assemble and disassemble and is changed, saves use cost, convenient to use. The utility model is realized by the following technical scheme that the double-movable gate valve for chemical production comprises a valve body, wherein the upper end and the lower end of the valve body are fixedly connected with valve caps, and the double-movable gate valve is characterized in that two left and right opposite valve seats are arranged on the inner wall of the valve body, two conveying pipes corresponding to the two valve seats are fixedly connected on the valve body, a piston cylinder is arranged between the two valve seats, the left end and the right end of the piston cylinder are both connected with pistons in a sliding manner, one ends, far away from each other, of the two pistons are fixedly connected with gate plates, the two gate plates are respectively matched with the two valve seats in a sealing manner, the top of the piston cylinder is fixedly connected with a valve rod, and the upper end of the valve rod extends to the outside through the valve caps; the piston cylinder further comprises a driving assembly for driving the two pistons to slide away from each other along the axial direction of the piston cylinder. According to the scheme, the driving assembly drives the two pistons to be far away from each other, so that the two flashboards move along the horizontal direction and are in sealing connection with the corresponding valve seats, pressure is relieved when the valve is closed, friction between the flashboard and the valve seats is greatly reduced, abrasion between the valve seats and the flashboard is effectively reduced, and the service life of the valve is prolonged. The valve rod is arranged in a hollow mode, one ends, close to each other, of the two pistons are fixedly connected with guide blocks, one sides, close to each other, of the two guide blocks are provided with guide inclined planes, the driving assembly is an extrusion rod penetrating through the valve rod and sliding up and down, the lower end of the extrusion rod penetrates through the piston cylinder to extend between the two guide blocks, the lower end of the extrusion rod is provided with two extrusion inclined planes, and the two extrusion inclined planes are matched with the guide inclined planes of the two guide blocks respectively. According to the scheme, the extrusion rod slides downwards along the valve rod, the extrusion inclined surface at the lower end of the extrusion rod is attached to the guide inclined surfaces of the two guide blocks, the extrusion rod extrudes the two guide blocks outwards, the two guide blocks move away from each other, the two flashboards are further moved away from each other to respectively compress the two valve seats, sealing butt joint of the flashboards and the valve seats is achieved, and sealing of a conveying pipe orifice is achieved. As